songcopy65
20.05.2021 7:04:31
Re: Volvo Penta 8.1 GI fuel pump issue more
See full version: Volvo Penta 8. 1 GI fuel pump issue
Re: Volvo Penta 8.1 GI fuel pump issue more
Any insight would be appreciated! more
I'm not sure exactly how the Volvo works, but it may have an oil pressure switch that won't allow power to the fuel pump if the engine is not turning over. here
Re: Volvo Penta 8.1 GI fuel pump issue
My boat acted like it was out of gas and had to be towed in. I have done some troubleshooting posted by Don S. This is what I have done so far;
1. With the ignition switch off, verified battery voltage between terminal 30 and 86 at the fuel pump relay socket.
2. put a jumper between terminal 30 and 87. more
The fuel pump came on and I noticed that was cutting off as I moved the wires around the area. The 20 amp breaker was bad inside so I replaced with a new one (wires were tight but the rods had broken inside making intermittent contact). As happy as I could be installed the relay back and tried to start the engine. I still had the same problem. I took the relay out again and put the jumper. The engine started with no problems and stayed on.
3. With the engine running and the jumper on the socket I verified battery voltage at terminal 85 and 86. (This should have verified power from the alternator). While the engine still running I removed the jumper and quickly installed the relay back. The engine shutt off after a minute. more
4. I replaced the relay with a new one and still no luck. here
My Engine is 5.0 litters GL Volvo Penta Ser# 4110161641 or 3869BSA or 3868892 (Im not sure what number is the serial).
Re: Volvo Penta 8.1 GSI Problems [links]
HIGH ENOUGH exhaust risers stop reversion problems. Unless the boat is just too low then nothing will stop the reversion. Year of engine and boat it is in would help. Do you know for sure the camshaft is stock? Type and make of exhaust and the height of the riser spacer. Good accurate guess in the difference between waterlevel and the middle of the top riser loop.
Dave,Thanks, I would appreaciate the link [links]
Re: Volvo Penta 8.1 GSI Problems more
the reversion problem is there with both the merc and the volvo<br /> the merc risers are turned down a few degrees more than the volvo but both have nuemerous tech bullitens about how to test for reverion. seems its not all overlap but very high pressure pulses in the opposite bank. volvo has a kit that is a baffle as well as a balance tube that crosses the exhaust risers. most common on boats that have a Y pipe or a common collector. the cam shaft is very aggressive and in some cases a 1 foot riser heght wont help. describe your hull and exhaust and the riser X dimension.
Thanks, Rodbolt, Cyclops2 and Newport Dave. The vessel is a Doral 360 SE,2002. Volvo claim that they fitted the 7-inch high spacers between the manifold and riser, because of "pressure" issues. An inspection of the valves show that they arent perfectly <br />in sync. Both engines have taken water into the inside banks in the central cyclinders. The vessel was stationary at the time of failure and had just had the engines run at low RPM simply to ensure running condition following a two month lay over at the dock.
Looking for a source to test a fuel pump off a 8.1L Volvo Penta. Low pressure fuel pump started making a buzzing noise. Engine idled ok but died shortly after you raised the RPM. Checked the fuel pressure and had zero PSI on the low PSI side & 25 psi on the high pressure side. Next day the buzzing noise was gone & I'm now getting 5-6 PSI on the low PSI side & 35 PSI on the High PSI. Boat seems to run fine but concerned that this issue might present itself again. From what I've read, the PSI should be 10 & 50 PSI? here
On a side note, I've had battery trouble with the boat. Thought the alternator might be bad but it tested and it's putting out 14.6 volts. One of the batteries ended up being bad even though it's only a 1-1/2 old. I suspected that low voltage out put from the alternator could cause an issue with the batteries & possibly the fuel pump but doesn't look that's an issue. here